Easy tearing bags and packaging material

a technology of packaging material and tearing bag, which is applied in the direction of transportation and packaging, sacks, synthetic resin layered products, etc., can solve the problems of inner layer weakness, and achieve the effect of facilitating the initiation of a tear

Inactive Publication Date: 2002-01-03
TECKSOM INT
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

0050] In preferred embodiments, one end or both ends of the tearing line contains a small opening, break, nick, notch or the like. This facilitates the initiation of a tear. The tearing line may be visibly indicated on the bag, for example by printing a perforated line at the relevant position.
0051] The bag is preferably sealed at or adjacent its edges. In one preferred form of the invention, the interior of the bag includes a main portion...

Problems solved by technology

Furthermore, the line of weakness in the inner layer may be the interf...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Easy tearing bags and packaging material
  • Easy tearing bags and packaging material
  • Easy tearing bags and packaging material

Examples

Experimental program
Comparison scheme
Effect test

second embodiment

[0096] The second embodiment illustrated in FIG. 8 utilises two sheets of the ACE laminate illustrated in FIG. 6. Each of the sheets ACE include three layers namely:

[0097] a transparent outer layer A over-printed with a colour pattern;

[0098] an inner layer C comprising two abutting pieces, one being a thin metallised strip and the other being a wide transparent piece;

[0099] and an additional transparent layer.

[0100] The two sheets ACE of laminated flexible material are aligned and overlapped with one sheet laid directly upon the other, ensuring that the interface between the abutting pieces on respective sheets are aligned. As illustrated in FIG. 8b, three edges of the two sheets are heat sealed together leaving unsealed aligned edges at one open end The bag can then be filled with contents as illustrated in FIG. 8b through the open end prior to the edges at the open end being sealed as illustrated in FIG. 8c. The bag 30 so formed is then provided with a nick 32 along a first edge o...

sixth embodiment

[0107] In a sixth embodiment illustrated in FIG. 10, a ziplock is incorporated during manufacture to provide a resealable bag 80. The ziplock 82 is disposed closer to the contents of the bag than the aligned lines of weakness 34. In this way, once the bag has been torn along the lines of weakness 34, the bag can be resealed through the use of the zip-lock 82.

[0108] Figures 11a and 11b show a bag 90 which is similar in construction to the bag 30 illustrated in FIG. 8, except that a top end of the bag is sealed to almost the lines of weakness 34 and additionally the bag is sealed together in strips along its length to form partitions 92 thus creating compartments ABC in the bag. It can be seen from FIG. 11a that the partitions 92 cross the lines of weakness 34. As this bag is tom open, the compartments A, B and C are opened in series. With a single tearing motion, these three compartments can be opened essentially simultaneously. However, if the tearing motion is punctuated then the c...

tenth embodiment

[0113] FIGS. 13a and b illustrate the present invention. The bag formed 120 is similar in principal to the bag 100 shown in FIG. 12, except that there are nine compartments arranged in a three by three grid array. Additionally, the ACE sheet has six parallel lines of weakness 122, adjacent pairs of which extend across three aligned compartments as illustrated in FIG. 13b.

[0114] As an alternative to using a sheet of polythene P as the backing sheet as per FIG. 13a, a preformed blister sheet can be used as illustrated in FIG. 13c. Such an embodiment of the invention may have application in the pharmaceutical industry.

[0115] A twelfth embodiment is illustrated in FIG. 14. In this embodiment a bag 130 is formed by two overlapping and aligned sheets. A gusset portion 139 is provided in the base of the bag and the sheets and the gusset portion are sealed together. The sheets of the bag are also sealed together at a top portion 132 of the bag 130.

[0116] Additionally, a gusset portion 137 i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Temperatureaaaaaaaaaa
Lengthaaaaaaaaaa
Sizeaaaaaaaaaa
Login to view more

Abstract

A multi layered packaging material (10) comprises a first inner layer C and a second outer layer A. The inner layer has a line of weakness 34 extending there along while the second outer layer A is substantially intact along the line of weakness. In the packaging material 10, the line of weakness is formed by two pieces of material C1, C2 with their edges in substantial abutment, the abutted edges creating the line of weakness. Bags 20, 30, 40, 60, 70, 80, 90, 100, 130, 140, 150 may be formed from the packaging material. However, the bags so formed are not limited to having the line of weakness created by abutting edges in the inner layer C.

Description

[0001] This invention relates to bags, packages or packaging material which can easily be torn, without the need for scissors, for instance. In particular, although not exclusively, the invention relates to sealable plastic bags for the containment of food or beverages. However the invention is not limited in its application to food packages and may have application to other industries such as pharmaceuticalsBACKGROUND TO THE INVENTION[0002] The waterproof, air-tight and durable nature of plastic bags means that they are widely used for packaging goods. Various ways for facilitating the opening of such bags are known. The simplest approach is to print a line on the bag to indicate where an opening should be cut. This cut might open directly onto the contents of the package (eg FIG. 1) or it might open onto a spout integrated into the package (eg FIG. 2; see also U.S. Pat. Nos. 4,491,245, 4,793,121 & 4,935,283 and the "Ampac.TM. spout-pack"). Such a spout also makes a convenient open...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B65D65/28B65D33/00B65D75/58B65D75/62B65D77/28
CPCB65D75/58B65D75/5805B65D75/5811B65D77/283B65D65/22
Inventor TANG, LUEN SING
Owner TECKSOM INT
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap